"Extremism is as American as Apple Pie." Shaykh Hamza Yusuf
"Violence is." Argues Hamza Yusuf, especially when talking to Amerikanos about Muslims. He points out that Amerikano culture is based on all kinds of extremism. If you think that's true, be sure you don't know basic facts about Amerikanos :P
He's not arguing about 100% elimination of violence, rather persecution of dissenting voices, and dominance of one strand of thought over the other.
Without being apologetic about anything, one founder of a school of Law Imam Shafi or perhaps Imam Malik was asked by Khalifa Mansoor: i want to implement your interpretation on all of my dominion. To this Imam replied in an emphatic nay. In the presence of other towering luminaries and in the light of one's legitimate right to recourse to a differing expert opinion, he refused this historical choice that could've influenced heavily the religious and legal history of Muslims, perhaps. It is exactly the betrayal of tradition that sects have taken up arms against each other while we dialogue non-Muslims with such civility that bewilders a local who had the nightmare of watching sectarian strife. Of course, honorable, respectable academic intra-dialogue is only necessary and perhaps sufficient if executed.